When the Minnesota Twins acquired reliever Sam Dyson from the San Francisco Giants, they had planned on him being a critical part of their bullpen unit in the push for October.

The Twins have essentially clinched a playoff spot, but there is a very real chance that Dyson will never pitch another inning for the franchise.

Dyson underwent capsule repair surgery on his right shoulder on Tuesday, and the timetable for recovery is up to 12 months, meaning that Dyson might be unavailable for the 2020 season:

Naturally, this makes Dyson a likely non-tender candidate in Minnesota (Dyson has one year of arbitration remaining), which would effectively make him a free agent.

The right-hander was one of the top relief targets prior to the July trade deadline after posting a 2.47 ERA and 0.902 WHIP in 51 innings of work with the Giants. In fact, Dyson had a 2.94 ERA during his time in San Francisco, and he had established himself as one of the more dependable setup men in the game.

Dyson struggled to make a good first impression with the Twins. He gave up six hits and six earned runs in just 2/3 of an inning in his first two appearances with Minnesota.

However, the right-hander would settle into his new digs. After a rough awakening, Dyson posted a 2.53 ERA over the next 10 2/3 innings, racking up six holds in the process.

Minnesota's bullpen has managed to be effective despite the loss of Dyson, but his extended absence does not bode well for 2020.

Unfortunately for Dyson and the Twins, this is likely to go down as one of the most maligned trades in recent MLB history.